Class: MysqlAlterMonitoring::Monitor

Inherits:
Object
  • Object
show all
Defined in:
lib/mysql_alter_monitoring/monitor.rb

Overview

MysqlAlterMonitoring::Monitor

Constant Summary collapse

EMPTY_EVENT_MAX_COUNT = 
10

Instance Method Summary collapse

Constructor Details

#initialize(client, io, logging_interval: 10) ⇒ void 



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# File 'lib/mysql_alter_monitoring/monitor.rb', line 14

def initialize(client, io, logging_interval: 10)
  @client = client
  @logger = JsonLogger.new(io)
  @logging_interval = logging_interval
  @performance_schema_setting = PerformanceSchemaSetting.new(client, io)
end

Instance Method Details

#run_forever ⇒ void 



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# File 'lib/mysql_alter_monitoring/monitor.rb', line 37

def run_forever
  run { false }
end

#run_until_empty_event ⇒ void

This method returns an undefined value.

Fetch ALTER TABLE events at specified intervals and output in JSON format to specified IO. Exit when a total of 10 empty ALTER TABLE events are fetched.



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# File 'lib/mysql_alter_monitoring/monitor.rb', line 25

def run_until_empty_event
  empty_event_count = 0

  run do |event|
    empty_event_count += 1 if event.empty?
    empty_event_count > EMPTY_EVENT_MAX_COUNT
  end

  logger.info({ message: 'Finish monitoring' })
end